/*
Copyright (c) 2006 - 2008  Universitaet Osnabrueck, virtUOS
Authors: Markus Ketterl, Johannes Emden, Nils Schuhmacher, Andreas Rickling

This file is part of virtPresenter.

virtPresenter is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.

virtPresenter is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with virtPresenter.  If not, see <http://www.gnu.org/licenses/>.
*/

package virtPresenter.commands
{
	import com.adobe.cairngorm.commands.ICommand;
	import com.adobe.cairngorm.control.CairngormEvent;
	import com.adobe.cairngorm.control.CairngormEventDispatcher;
	import mx.collections.ArrayCollection;
	import mx.rpc.IResponder;	
	import virtPresenter.business.LecturesDelegate;
	import virtPresenter.event.*;
	import virtPresenter.model.QueryString;
	import virtPresenter.model.SearchProvider;
	import virtPresenter.model.virtPresenterLocator;
	
	/**
	 * Commands handles a LoadLectureRecordingsXMLEvent and loads the lecturerecordings.xml.	
	 */	
	public class LoadLectureRecordingsXML implements ICommand, IResponder
	{	
		private var model : virtPresenterLocator = virtPresenterLocator.getInstance();	
		
		/**
		 * Execute method is invoked by the LoadMouseXMLEvent. Calls
		 * its delegate to recieve the result of the mouse.xml file.
		 * 
		 * @parameters event LoadLectureRecordingsXMLEvent
		 * 
		 * @see virtPresenter.event.LoadLectureRecordingsXMLEvent
		 */						
		public function execute(event:CairngormEvent):void
		{			
			var delegate:LecturesDelegate = new LecturesDelegate(this)
			delegate.getLectures();			 		
		}
		
		/**
		 * Result method is called by the LectureRecordingsXMLDelegate and stores the results
		 * of lecturerecordings.xml as an ArrayCollection in the model. 
		 * Throws a ChangedLectureFolderEvent.
		 *  
		 * @parameters data Data Object that contains the results of the request to the lecturerecordings.xml
		 * 
		 * @see virtPresenter.business.LectureRecordingsXMLDelegate
		 */
		public function result(data:Object):void
		{   
			virtPresenterLocator.getInstance().lectures = ArrayCollection(data.result.lecturerecordings.lecture);
			trace("LoadLectureRecordingsXMLCommand. Lecturerecordings.xml loaded!");
			model.searchProvider = SearchProvider.getInstance();
			CairngormEventDispatcher.getInstance().dispatchEvent(new ChangedLectureFolderEvent(0));				
		}
		
		/**
		 * Fault method is invoked by LectureRecordingsXMLDelegate if an error occured
		 * loading the lecturerecordings.xml file.
		 * 
		 * @parameters info Info object that contains information about the fault
		 * 
		 * @see virtPresenter.business.LectureRecordingsXMLDelegate  
		 */		
		public function fault(info:Object):void
		{
			trace("LectureRecordingsXMLCommand. Fault in loading lecturerecordings.xml: "+info.toString());
		}		
	}
}